Develop rigorous, client-ready energy concepts in hours, not weeks.
Take on more projects with the same team. Sympheny handles the scenario preparation so your engineers focus on the judgement clients actually pay for. For most teams, the time recovered pays back the licence cost within the first two projects.
In a 30 minute demo, see your project set up, scenarios compared, and a report ready to share.
Scenario setup, optimisation, and reporting in one workflow.
Swiss company · EU-hosted by default · US enterprise deployment options · Customer data remains yours
*Based on Sympheny's Solar Impulse Foundation impact assessment.
A rigorous optimisation engine wrapped in a practical planning platform.
Sympheny is built for the full energy planning workflow: data foundation, digital twin, optimisation, scenario comparison, and decision communication.
One model for all energy carriers
Model electricity, heat, cooling, gas, hydrogen, storage and mobility together — not as separate exercises. Sector-coupling options and infrastructure constraints are compared in the same environment.
- Multiple conversion technologies per hub
- Storage modelled inside the same optimisation
- Add custom technologies from your own assumptions
Iterate at district scale — without starting over.
Bring asset catalogues, hourly demand profiles, tariffs, GIS layers, and meter data into one reusable planning model. Scale from a single building to a 78-district city without starting over.
- GIS context for every building and hub
- Hourly demand and tariff profiles in one place
- Reusable across feasibility, planning and tendering
Outputs your stakeholders can actually read
Hourly demand profiles, load-duration curves, Sankey energy flows and Pareto cost/CO₂ comparisons — all generated from the same model and viewable directly in the app. Print to share, no rebuilding charts in slide decks.
- Hourly resolution across a full reference year
- Peak-shaving and storage-sizing visible at a glance
- Stakeholder-ready exports without manual rework
A short ramp-up to powerful, flexible energy modelling.
Sympheny gives expert users the flexibility of advanced energy system optimisation without a long implementation burden. For users with prior experience in optimisation or energy-system modelling, the platform can usually be understood in less than a week. Once workflows are established, many studies can be set up in around 30 minutes.
See why most teams recover the license cost after 1-2 projectsTime savings vary by project complexity, input data quality, and team experience. Examples reflect common workflows after the relevant setup is in place.
From building-level site data to a complete multi-energy concept.
Start from real GIS and building data. Optimise across electricity, heat, gas, solar and storage in one model. Hand stakeholders a Sankey energy flow and a structured report at the end.
Proven from districts to campuses to whole-city strategies.
Green hydrogen produced on-site — at a production cost comparable to today's diesel. Life-cycle costs cut by 26% vs the fossil baseline.
Read case study26 buildings across 12 hubs in one living plan — 10% reduction already achieved, 25% more modelled toward 2030 climate neutrality.
Read case studyThree city-wide scenarios confirmed a net-zero energy supply is achievable — at similar life-cycle costs to today's fossil-based system.
Read case studyFor teams running multiple projects a year, the numbers tend to work in your favour.
Built for the organisations shaping local energy systems
Sympheny supports the teams responsible for turning technical options into decisions, plans, and client-ready outputs.
Engineering & Consulting Teams
Energy experts and project teams need to move from fragmented inputs to defensible scenarios without losing weeks to manual preparation.
Explore engineering workflowsUtilities & Energy Providers
Plan across sites, networks, tariffs, and long-term investment horizons with scenarios that can support infrastructure decisions.
Explore utility workflowsCities & Public-Sector Planners
Build energy strategies, district plans, and reporting outputs with a process that fits public-sector timelines and stakeholder needs.
Explore public-sector planningDevelopers & Industrial Sites
Compare site energy concepts across CAPEX, OPEX, CO₂, grid constraints, and phasing before major infrastructure decisions.
Explore site planning workflowsRigour, usability, and proof in the same platform.
Defensible energy concepts need three things at once — rigorous maths, a tool engineers will actually use, and outputs that hold up in front of a client. Sympheny is built for all three.
Calculations run on a deterministic MILP engine — no AI in the optimisation loop. Clustering is statistical; ML demand forecasting is opt-in and never trained on customer data.
Model electricity, heat, cooling, gas, hydrogen, storage, and mobility together, so sector-coupling choices are evaluated in one connected system.
Commercially deployed since 2020, with 70+ customers and real-world references across districts, campuses, utilities, industrial sites, and policy scenarios. Includes the Nanoverbund thermal micro-grid in Basel, recipient of the Watt d'Or Prize 2025 from the Swiss Federal Office of Energy.
"Sympheny supports our strategic energy planning in an ideal way. The flexibility is extremely convincing and the sensitivity analysis provides security in finding solutions."
Built for consultants, developers, and utilities.
From a first feasibility concept to a full client portfolio — three tiers built around how energy planning teams actually work.
See pricingReady to deliver energy concepts faster, with more scenarios and clearer trade-offs?
See how much faster your team can build and compare scenarios.
In a 30 minute demo, see your project set up, scenarios compared, and a report ready to share.